look for:
- if 2006 or older, check to make sure the rotors are slotted and that the coolant isn't cottage cheesy (both were fixed by a TSB)
- check the front fascia - that it's attached properly, that the rubber underneath is in the right position and not torn, that there's no tearing of the rubber around the 2 front wheel wells.
- check that the front ash tray stays closed after opening it (really)
- if the sound system has the option for the kicker in the trunk, check the radio reception carefully. many SRT kicker systems were installed with faulty amps that caused a lot of radio interference.
- check the sunroof for noise at high speed (if applicable).
- don't forget to blow out the carbon.
edit: nevermind, misread your question!